6b. Once your score is made, hold the
glass with one thumb and forefinger
on each side of the score, wrists away
from the glass. Pull away and up with a
snapping motion. If the score is good,
the glass will snap right along your
score line.

6c. Place your cut pieces onto your
layout copy.

TIPS

»When cutting a straight
line, you can slide the cutter along a straightedge.

»To break glass on a
straight score line, use grozing pliers. With one hand,
hold the pliers on one side
of the score, flat jaw on top
of the glass, curved jaw
underneath. With the other
hand, hold the glass on the
opposite side of the score.
Snap to break the glass
along the score. It should
snap off easily.

»If you’re having trouble,
use running pliers, which
are made specifically for
breaking glass along
score lines.

7. CREATE A RIGHT ANGLE

Using a carpenter’s square, align a few strips of wood to create a
right angle to secure 1 corner of your window while you work. Nail
the strips to your work surface so they come right up against the
outside edge of where you have drawn your zinc border.

8. MARK AND CUT 2 ZINC BORDERS

8a. Lay a strip of zinc along the inside
of the right angle where you’ve drawn
the border. Mark its opposite edge. Cut
the zinc to size with a hacksaw. Repeat
to cut the second side of the zinc
border, then fit it tightly into the right
angle to meet the first.

8b. Tack down the outside corners of the 2 zinc strips with nails,
so they won’t move around when you start leading.